Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling
Abstract For improving the hole-enlarging capability, roundness and rock-breaking efficiency of the nozzle in radial jet drilling, a new structure of self-rotating nozzle was put forward. The flow structure and rock-breaking features of the self-rotating nozzle were investigated with sliding mesh mo...
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KeAi Communications Co., Ltd.
2019
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oai:doaj.org-article:5f9d62ec28da49c5831ad5cc327fef2f2021-12-02T12:09:40ZFlow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling10.1007/s12182-019-00378-01672-51071995-8226https://doaj.org/article/5f9d62ec28da49c5831ad5cc327fef2f2019-11-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-019-00378-0https://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract For improving the hole-enlarging capability, roundness and rock-breaking efficiency of the nozzle in radial jet drilling, a new structure of self-rotating nozzle was put forward. The flow structure and rock-breaking features of the self-rotating nozzle were investigated with sliding mesh model and labortary tests and also compared with the straight and the swirling integrated nozzle and multi-orifice nozzle which have been applied in radial jet drilling. The results show that the self-rotating jet is energy concentrated, has longer effective distance, better hole-enlarging capability and roundness and impacts larger circular area at the bottom of the drilling hole, compared with the other two nozzles. Forward jet flow generated from the nozzle is peak shaped, and the jet velocity attenuates slowly at the outer edge. Due to periodic rotary percussion, the pressure fluctuates periodically on rock surface, improving shear and tensile failures on the rock matrix and thereby enhancing rock-breaking efficiency. The numerical simulation results of the flow structure of the nozzle are consistent with the experiments. This study provides an innovative approach for radial jet drilling technology in the petroleum industry.Hua-Lin LiaoXia JiaJi-Lei NiuYu-Cai ShiHong-Chen GuJun-Fu XuKeAi Communications Co., Ltd.articleSelf-rotating nozzleFlow field characteristicNumerical simulationRock-breakingScienceQPetrologyQE420-499ENPetroleum Science, Vol 17, Iss 1, Pp 211-221 (2019) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Self-rotating nozzle Flow field characteristic Numerical simulation Rock-breaking Science Q Petrology QE420-499 |
| spellingShingle |
Self-rotating nozzle Flow field characteristic Numerical simulation Rock-breaking Science Q Petrology QE420-499 Hua-Lin Liao Xia Jia Ji-Lei Niu Yu-Cai Shi Hong-Chen Gu Jun-Fu Xu Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| description |
Abstract For improving the hole-enlarging capability, roundness and rock-breaking efficiency of the nozzle in radial jet drilling, a new structure of self-rotating nozzle was put forward. The flow structure and rock-breaking features of the self-rotating nozzle were investigated with sliding mesh model and labortary tests and also compared with the straight and the swirling integrated nozzle and multi-orifice nozzle which have been applied in radial jet drilling. The results show that the self-rotating jet is energy concentrated, has longer effective distance, better hole-enlarging capability and roundness and impacts larger circular area at the bottom of the drilling hole, compared with the other two nozzles. Forward jet flow generated from the nozzle is peak shaped, and the jet velocity attenuates slowly at the outer edge. Due to periodic rotary percussion, the pressure fluctuates periodically on rock surface, improving shear and tensile failures on the rock matrix and thereby enhancing rock-breaking efficiency. The numerical simulation results of the flow structure of the nozzle are consistent with the experiments. This study provides an innovative approach for radial jet drilling technology in the petroleum industry. |
| format |
article |
| author |
Hua-Lin Liao Xia Jia Ji-Lei Niu Yu-Cai Shi Hong-Chen Gu Jun-Fu Xu |
| author_facet |
Hua-Lin Liao Xia Jia Ji-Lei Niu Yu-Cai Shi Hong-Chen Gu Jun-Fu Xu |
| author_sort |
Hua-Lin Liao |
| title |
Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| title_short |
Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| title_full |
Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| title_fullStr |
Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| title_full_unstemmed |
Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| title_sort |
flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling |
| publisher |
KeAi Communications Co., Ltd. |
| publishDate |
2019 |
| url |
https://doaj.org/article/5f9d62ec28da49c5831ad5cc327fef2f |
| work_keys_str_mv |
AT hualinliao flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling AT xiajia flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling AT jileiniu flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling AT yucaishi flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling AT hongchengu flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling AT junfuxu flowstructureandrockbreakingfeatureoftheselfrotatingnozzleforradialjetdrilling |
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